This work aims to develop statistical models for ultrafine/fine particle number emission rates from a
diesel bus, to evaluate the explanatory power of engine operating variables. Emissions were recorded
by using on-board instrumentation in two types of real-world driving conditions: a freeway
commuting route and a within-city-limits bus route, with stop and go due to intersections and bus
stops. To reduce the risk of drawing spurious conclusions, three replications of the experiment were

Assessing the importance of transportation facilities is an increasingly growing topic of interest to federal and state transportation agencies. This work proposes an optimization based model that uses concepts and techniques of complex networks science to assess the importance of transportation facilities.

State-of-the-art technology is available which incorporates shredded scrap tire rubber known as crumb rubber modifier (CRM) as a modifier for asphalt cement in paving mixtures. CRM is the general term to describe all rubber particles obtained from the shredded of discarded tires which are reduced up to a size of 6.35 mm. Two technologies are most commonly used to incorporate crumb rubber in asphalt pavement applications, namely, the wet and dry process.

<p>In New York City, as in other highly urbanized areas, several factors make it too difficult to apply pavement management systems methodology in the traditional way. Two of those factors are: underground utilities and utility cuts; together, they are the two most significant life-limiting factors for NYC pavements. Non-Destructive testing (NDT) techniques such as the Falling Weight Deflectometer (FWD) have been successfully used to evaluate the conditions of rural pavements.

<p>In New York City, as in other highly urbanized areas, a number of factors make it too difficult to apply pavement management systems methodology in the traditional way: the existence of underground utilities and utility cuts. The potential of future patching which affects pavement performance. The fact that more than 70 % of NYC pavements are composite pavements, which are not suited for Non-Destructive Testing (NDT) analysis techniques. The objective of this project is to develop a NDTbased framework to effectively manage urban pavements at the project level.

Advanced traveler information systems (ATIS) attempt to provide drivers with data intended to help them make better travel decisions. Messages may be available to all drivers (for example by radio or television broadcasts) or only to some: for example, those who pass near a particular infrastructure (such as variable message signs or VMS) or who have special receivers in their vehicles. Drivers, of course, may react to the messages in any way they choose.

Speed limits have been introduced for many reasons, e.g., to reduce gas consumption, to reduce the frequency and severity
of crashes, and in some cases to reduce noise. The objective of this research effort was to conduct a literature review to
assess the effect of increased speed limits on limited access roads regarding safety, travel speeds, and other unanticipated
impacts including shifts in lane distribution, traffic diversions, and spillover effects. Following are the conclusions:

In 1974, a national maximum speed limit (NMSL) of 55
mph was introduced to reduce the consumption of fuel.
NMSL was followed by a dramatic reduction in the
number of fatal crashes and Congress decided to
continue with the 55 mph speed limit. In 1987, states
were allowed to increase the speed limit to 65 mph on
certain rural interstates. New Jersey did not change the
55 speed limit at that time since 'very little mileage
qualified as rural interstate.' In May 1998, New Jersey

<p>Fiber-reinforced polymer composites represent an alternative construction material without many of the performance disadvantages of traditional materials. The use of fiber-reinforced polymer as a pile material can eliminate deterioration problems of conventional piling materials in waterfront environments and aggressive soils. This paper presents the preliminary results of an experimental study conducted to assess the durability of piling made of recycled plastics in aggressive soils for long-term usage in civil infrastructure applications.

The objective of this research was to perform evaluation tests related to the transmission of digitized video signals over ISDN between a video traffic reporting camera and a traffic management center. The quality of the received video signals was assessed for effectively monitoring the traffic conditions. An evaluation plan was developed which consisted of a market survey of current video-transmission options, an identification of the hardware specifications for the ISDN connections, and a description of the tests to be performed.